23-01-2018 3:14 PM
When a buyer doesn't pay you need to open an unpaid item case. You can open it any time between 4 and 36 days after the listing ends, and close it after four days if they haven't paid. For details, see: http://pages.ebay.co.uk/help/sell/unpaid-items.html
Your final value fee (but no other fees) will then be credited back to your account and you can safely relist the item, or make a second chance offer. The buyer will receive an unpaid item strike. Neither party can leave feedback; any already left can be removed.
Always add non-payers to your blocked bidders list, see: https://pages.ebay.co.uk/help/sell/manage_bidders_ov.html